Index leaf



Nov. 19, 1929. J. L. McMILLAN INDEX LEAF Filed June 4; 1928.

2 Sheets-Sfieet 4? /oNVE N TUE WITNESS Nov. 19, 1929. J. L. M MILL AN 1,736,165

Y I nmnx LEAF Filed June 4. 1928 z Sheets-Shee 2 /NVEN T01? WIT/v5.9.5 BY A 4 TTDRNEYS 'Patented Nov. 19, 1929 JOHN MCMILLAN, or svnaousn, NEW YORK, nssrenon T MGMILLAN BOOK COM- IPANY, or SYRACUSE, new YOR;K,.ACORPOBATIOI\I or nnwvon'x INDEX-'LEAIE Application filed June 4, 1928. Serial No. 282,737.

Serial No. 261,532, and a further objecttof my lnvention is to construct indexing leaves This invention relates to a new and improved lIlClGX leaf for visible index binders. When a loose leaf binder is used as a visible index the sheets in the binder are less in height than the over-all height of the binder so that they may be positioned in the binder in overlapping arrangementwhereby a por they cover all of the sheets in the portion for which they are the indices;

'VVhen sheets are assembled ina binder in overlapping relation the number of sheets superimposed upon each other will vary at different points in the binder. That is to say, there will be fewer sheets superimposed one upon the other at the top and at the bottom of the binder than will be the'case at the intermediate portion of thebinder. This being the casethe thickness of the book will be greater in the middle portion than it will at the top and the bottom which will result in a distortion of the binder which will render the same unsightly and less convenient to use.

The main object of my invention is to'construct indexing leaves of such a shape and size that they will in themselves compensate for the different thicknesses of the book and will insure a book of even thickness through out its height. 1

In loose leaf binders which are used as visible indices there is usually provided a means for transferring sheets vertically of the binder without the necessity of removing the sheets from the prongs on which they are carried. In one type of binder having a transferring device the prongs carried by one of the back members of the binder are pivoted so that they may be swung sidewise and their position changed in relation to the opposing prongs as disclosed in an application filed by me for loose leaf binder, March 14, 1928,

position in .a binder. 1

which will prevent the closing of the binder when the prongs are in thetransferring position. i

i Other objects and advantages relateto the I size, shape and arrangementof parts all as will more fully appear from the following description taken in connection with the accompanying drawings in which z-.

Figure 1 is a perspective view-of myi-ndexmg leaf.

Figure 2 i a section on line '22io-f Fig- .ure 1. q

1 Figure 3 is a section on line 33 of Fig urel. e i

Figure- 4. is a top-plan view, partially broken away, showing an indexing leaf in Figure 5 is aperspective view of a moditied form of my device.

Figure 6-is a section on line 6-6 of Figure 5. I r

Figure 7 1s a Set/D1011 on line 7-7 of Figure'5.

Elly-indexing leaf -1 maybe varied in size and shape to fit the particular binder with which itis to be used but in each instance it consists of a main body portion usually provided on one longitudinaledge with a tab upon which indicia maybe placed, it being understood that the position of tabs 3 on the indexing leaves, which are used in a binder, may be varied so that whenthe indexing leaves are in position in a binder all p of the tabs 3will be exposed to view. The

ends of body 2, as perhaps may best be seen from Figure 3, arereturn bent on them-- selves so-that they will form ends and in spaced relation, whichends 4.

and 5 will be double the thicknesszo-f the remaining part of body The double thick ends i-and 5 extend inwardly from the As perhaps may bestbe seen from Figure 2, I providetabs -6 of the same widthas ends ete and. -5.. V Tabs- -efi aretformed' of a single piece of leather orother appropri ate material return bent on itself and having in its outer end a reinforcing plate 7 of tin or other appropriate material. The edge of body -2 which is adjacent end 4 is inserted between the open edges of a tab 6 with the ,upper edge of tab 6 abutting against the end of end 4- and the tab 6 is then fastened in position by gluing or other convenient means. A similar tab 6 is affixed to body 2-' adjacentend 5 in a similar manner. Tabs 6- are provided with a plurality, in this case shown as five, of spaced apertures 8. extending through the outer edge of tab -6 in which the reinforcing plate 7- is positioned. As perhaps may best be seen from Figure 4:, apertures 8 are provided so that the indexingleaf -1 may be placed on prongs 9 of a loose leaf binder.

The distance between the centers of apertures 8 is twice thedistance between the centers of theapertures 10 with which the sheets 11 of the binder are provided with the result that when the prongs 12 of a transferring binder l3 are rotated to either of the positions indicated in dotted lines on Figure 4,

' the binder cannot be closed because there will be no apertures 8 in indexing leaf l into which prongs 12 may enter which will be notice to the operator that the prongs 12 must bereturned to thenormal position before the book can be closed. In Figures 5, 6, and 7 I have shown a modification of my device'which comprises a body lkhaving the usual indexing tab -19 but inorder to provide thicker ends similar to ends -4:' and 5 I form a tab 15 made of a single piece of leather or other ap- .propriate material and return bent onitself.

A reinforcing plate 16 of tin or other appropriate material is provided in the closed end of tab 15 The length of tab 15 is such that when body 14 is inserted into the open end of tab 15-' with one edge ad- -j2l0611ttl1 end'of body 14 tab 15 will extend the fullwidth of body 14 with its closed end extending outwardly from the edge ofbody 14. Tab 15- is secure- 1y fixedin this relation to body -14.- by the 15 is provided with a pluralit in this case shown as five, of apertures 1 in the end which carries the reinforcing plate 16 and'which are for a-use similar tothe use for whichapertures 8 were provided in tabs 6. It will be understood that a tab 15 is afbinder in a manner similar to the manner in 7 which the first described indexing leaf functions.

It will be understood that the materials of V which my indexing leaf and the diiferent parts thereof are constructed may be varied as desired, and it will also'be understood that the thickness of the ends of my indexing leaf compared to the thickness of the main body thereof may also be varied depending upon the type of binder with which my device is to be used and the number and position of the sheets normally carried by that particular binder. ,The width of the thickened ends of the indexing leaf may also be varied so that they may be adapted for use with different types'of loose leaf binders, for although I have shown and described a specific structure and form and'relation of parts "as an exemplification of an embodiment of my invention I do not desire to restrict myself to the exact size, shape or relation of parts as V a various changes may be made within the scope of the appended claims.

I claim :v a 1. Ina device of the class described, a body portion, relatively thick opposed end portions, and, a tab having a plurality of spaced apertures extending laterally from each of the end portions. j 1

2. In a device of the class described, a body portion, relatively thick opposed end portions, an index tab extending laterally from one longitudinal edge of the body portion,

and a'tab having a plurality of spaced apertures extending laterally from each of the end portions.

3. In a device of the class described, a body having a portion of each end return-bent upon itself to form double thick end portions, an indextab extending laterally from one longitudinal edge of the body, and a tab havinga pluralitylofspaced apertures extending laterally from each of thedoublethick'end portions on the opposite longitudinaledge of the body.

In witness whereof I have hereunto set my hand this 29th day of May, 1928. JOHN L. MolVIILLAN.

use of'gl ue :or other convenient means. Tab, 

